CMake: fix runtests.pl with CMake, add new test targets

  * runtests.pl:
    - Fix out-of-tree build under CMake when srcdir is not set. Default
      srcdir to the location of runtests.pl.
    - Add a hack to allow CMake to use the TFLAGS option as documented
      in tests/README and used in scripts/travis/script.sh.
  * Bump CMake version to 3.2 for USES_TERMINAL, dropping Debian Jessie
    support (no one should care, it is already EOL.).
  * Remove CTest since it defines its own 'test' target with no tests
    since all unittests are already broken and not built by default.
  * Add new test targets based on the options from Makefile.am. Since
    new test targets are rarely added, I opted for duplicating the
    runtests.pl options as opposed to creating a new Makefile.inc file.
    Use top-level target names (test-x) instead of x-test since that is
    used by CI and others.

Closes #5358

1 files changed, 5 insertions, 8 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 224a09b1d..e9b90860c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,6 @@
 # The output .so file lacks the soname number which we currently have within the lib/Makefile.am file
 # Add full (4 or 5 libs) SSL support
 # Add INSTALL target (EXTRA_DIST variables in Makefile.am may be moved to Makefile.inc so that CMake/CPack is aware of what's to include).
-# Add CTests(?)
 # Check on all possible platforms
 # Test with as many configurations possible (With or without any option)
 # Create scripts that help keeping the CMake build system up to date (to reduce maintenance). According to Tetetest:
@@ -38,7 +37,7 @@
 # To check:
 # (From Daniel Stenberg) The cmake build selected to run gcc with -fPIC on my box while the plain configure script did not.
 # (From Daniel Stenberg) The gcc command line use neither -g nor any -O options. As a developer, I also treasure our configure scripts's --enable-debug option that sets a long range of "picky" compiler options.
-cmake_minimum_required(VERSION 3.0...3.16 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.2...3.16 FATAL_ERROR)
 
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake;${CMAKE_MODULE_PATH}")
 include(Utilities)
@@ -221,10 +220,6 @@ cmake_dependent_option(ENABLE_MANUAL "to provide the built-in manual"
     ON "NROFF_USEFUL;PERL_FOUND"
     OFF)
 
-if(NOT PERL_FOUND)
-  message(STATUS "Perl not found, testing disabled.")
-  set(BUILD_TESTING OFF)
-endif()
 if(ENABLE_MANUAL)
   set(USE_MANUAL ON)
 endif()
@@ -1280,8 +1275,10 @@ if(BUILD_CURL_EXE)
   add_subdirectory(src)
 endif()
 
-include(CTest)
-if(BUILD_TESTING)
+option(BUILD_TESTING "Build tests" "${PERL_FOUND}")
+if(NOT PERL_FOUND)
+  message(STATUS "Perl not found, testing disabled.")
+elseif(BUILD_TESTING)
   add_subdirectory(tests)
 endif()